"This roundup will compare modern 160 GB PMR 5k4 models and 100 GB 7k1 drives from Hitachi, Samsung, Seagate, and Western Digital. We'll do it on the eve of their successors, 250 GB models with PMR of the second generation. This article will analyze all of them plus another model - Seagate Momentus 5400.3 SATA. It appeared a lad later than its UATA modification, demonstrating higher performance."